M39003/01-8343/TR

Operating Temperature:	-55°C ~ 125°C
Failure Rate:	D (0.001%)
Features:	Military
Manufacturer Size Code:	A
Lead Spacing:	--
Height - Seated (Max):	--
Size / Dimension:	0.135" Dia x 0.286" L (3.43mm x 7.26mm)
Package / Case:	Axial
Mounting Type:	Through Hole
Lifetime @ Temp.:	--
Series:	Military, MIL-PRF-39003/1, CSR13
ESR (Equivalent Series Resistance):	--
Type:	Hermetically Sealed
Voltage - Rated:	100V
Tolerance:	±10%
Capacitance:	0.082µF
Moisture Sensitivity Level (MSL):	--
Part Status:	Active
Lead Free Status / RoHS Status:	--
Packaging:	Tape & Reel (TR)

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Tantalum Capacitors

M39003/01-8343/TR application field and working principle

Tantalum capacitors are electrolytic capacitors that use tantalum as the electrolyte material due to its high chemical stability. They are widely used in a variety of consumer, industrial and military applications, due to their superior electrical characteristics such as high energy density, long life expectancy, and small form factor. The specific model of M39003/01-8343/TR is a wet-slug tantalum capacitor that is typically used in relatively high voltage environments such as power supply regulation. One distinct property of tantalum capacitors is that they are polarized components, meaning that the anode and cathode need to be identified and connected properly in order for the capacitor to function correctly. This usually involves connecting the anode, which is typically denoted by a marking such as “+”, towards higher voltage, and connecting the cathode, often marked with a “-” towards lower voltage. The fundamental mechanism behind the operation of a capacitor is the concept of electric charge separation. This can be thought of as two metal plates with an insulator separating them. When an electric charge is placed on one of the plates, it will repel the opposite charge of the other plate. This results in an electric field being generated between the two plates, thus creating a capacitance. In the case of the M39003/01-8343/TR wet-slug tantalum capacitor, the two polarized plates are separated by a layer of tantalum pentoxide (Ta2O5). Since tantalum is an alkali metal it has a high affinity for electrons, allowing it to store substantially more charge than, for example, an aluminum capacitor. This leads to them having a higher capacitance than other practical electrolytic capacitors. In order for the capacitor to be used in high voltage applications, the two plates need to be placed further apart than is typically achievable with traditional aluminum electrolytic capacitor construction. To address this issue, wet-slug tantalum capacitors are constructed using a second can filled with liquid tantalum to make up the distance between the two plates. The entire assembly is filled with a conductive electrolyte. Once the capacitor is placed in a circuit, the charge at the anode is attracted to the cathode of the capacitor due to the established electric field, which will cause the total charge to build up.This is known as electric current passing through the capacitor and it serves to “charge” the capacitor. When the charge builds up to a certain level, it will reach a point of balance, known as the equilibrium point, where the difference in charge between the two plates cancels itself out. This causes the current to stop flowing, resulting in the capacitor being fully charged. Once the charge is balanced, the capacitor can be used to store energy and act as a buffer in the circuit. When a higher or lower voltage is applied to the capacitor, depending on the direction of the new voltage, the charges inside the capacitor either increase or decrease respectively. When the capacitance is discharged, the electric current runs in the opposite direction, restoring the charge of the capacitor to its equilibrium level. In conclusion, the wet-slug tantalum capacitor M39003/01-8343/TR is ideal for high voltage applications as its construction enables it to have a higher capacitance than traditional aluminum electrolytic capacitors. This design also comes with the benefit of a long life expectancy, as the high performance tantalum material and special construction prolong the lifetime of the capacitor.

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